Which of the Following Correctly Describes a P-Value

Which of the following correctly describes a p-value?

A) It gives the partial change in Y for a unit change in an independent variable, while holding other independent variables constant.
B) It equals the probability ofbeing true, given the claimThe true regression coefficient equals 0.
C) It is an index of the degree of linear association among more than two variables, equal to the square root of the sample coefficient of multiple determination.
D) It equals the ratio of an estimated partial-regression coefficient to its standard error.